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WILIJARD E. SIBLEY, 0F VWESTON, MASSACHUSETTS.

Letters Patent No. 103,670, dated Mag( 31, 1870.

To all whom lit may concern.-

Be it known that` I, WILLARD E. Sinner, oi` Wes ton, Middlesex county, in the State of Massachusetts,

have .invented certain new Improvements in ltlachinesA for Cutting Dovetails, Grooves, and Tenons and I hereby declare the following to be a full and exact description thereof, reference being had to the accompanying drawing forming part of this specification.

lhe nature or essence of `my invention consists iu the improvements described and claimed in the follow` ing specification,

'au/ing, in which- Figure l'is au elevation of the frontend, and

Figure 2'is a plan or top view.

In this drawing- A shows the form of the front and rear ends, made of cast-iron, and fastened by screws to two side frames, also of iron, made in the ing a strong frame to which the other parts are con- .necred or attached.

l fasten the stand G C to the rear end A for the shaft D to turn in, which is provided with a pulley, D', for a band from some moving power to run the machine. Y The shaft D also has the long pulley E on itt carrytlle belts that drive the cutter-shafts.

There is a central frame, F, fastened between the sides B, and made in the form shown, to hold the journal-boxes G- G of the horizontal cutter-arbors H- and I, which are tted to turn in the boxes and carry to do the work.

The shaft H is provided with a pulley for the band, l

IQ rom the pulley E to turn the shaft H, and saw L -to square the end of the board, and cutter M to cutav rabhet after it is squared.

The baud N from the pulley E drives the pulley P and shaft I, carrying the cutters Q Q, one of which fi cuts a rabbet and the other a groove, as shown in the board, Figure 10, and cutters Figure 5,1

The ends A are provided with horizontal flanges for. the adjusting-screws R R, which support the ways frame S whichrests upon thcm,.and is held down and in place by the screws l T.

The leit-hand ways frame is shown n hg. 2 withoutthe carriage U, which is. shown in Figure 6, and fittedV to traverse ou Ythe ways, and provided with ianges VV at each cud, to govern the position of the board being` cut.

The shaft I, at right-hand end, carries the saw W v to square the end ofthe board, Figure 9, and the cutters X and Y to reduce the end of the board in thickand shown iu the accompanying- "cutter h on the show u in figs. 1 and 4.

form shown in fig. 3, makl lover by-the screws l l, audwhen applied'to the board, iig. 10, as shown in Figure '8, the two will be firmly locked together.

rIhe carriage U is shown lon the ways at the right hand side of tig. 2; itis provided with adjusting stops orgauges ff to govern .the-length of .the board, and when the block g, Figures 6 and?, is put on it, the edges ofthe boards may he goroved (to receive the edges of the' bottom of the draw or box made) bythe There are three collars on 'each ,ofthesbafts Bland I, one of which is fastened* to the pulley, and they are all provided with set-screws-to lock them to the shaft, and theceuter collar ou each shaft is provided with set-screws ou each side, as shown at k k, fig. 2,. so

that, by loosening the serfscrews that lock the twoj outside collars and turning the screws la lathe shafts- H and I maybe adjusted eudwise in the journal-boxes to adjust thecutters to, their work. The jourualboxes may bealso adjusted higher or j fastened in their proper position by the screws m m, iig. 1l.

The perpendicular shaft b may be adjusted horizontally by the slots'and screws n n, Iig. 1, which hold its journal-boxes and the teipen'screw' p.' shown in fig. 11.

The machine "iiavingbeen constructed andarrauge'd as described, and' soi-ne boards prepared, they are placed ou the carriages, and held there while the carriage is traversed past the cuttem, which^ ents the ends together, as `shown in y into the proper form 'to klock e- 8 `Having described' m'v improvements 1. Them-rangement ot the collars k lo', yand setlsc'rews k It, for adjusting the shafts H and I endwise,

substantially as shown and described.

2. The arrangement of the cutter X between the.

saw W audcutter' Y, substantially as .shown and described. A,3. The yarrangement of the saws and cutters, shown and described,-for the purpose specified.

" WILLARD E. SIBLEY.

Witnesses F. R. C. Krrrnnnen,

R. S. WARREN.

rightehand end of theshait H, as Y- 

